m35b32 STMicroelectronics, m35b32 Datasheet - Page 14

• Manufacturer Part Number: m35b32
• Description: 32 Kbit, 256-byte Page, Fast Program Eeprom Memory Accessed By Spi Bus Interface
• Manufacturer: STMicroelectronics

Memory organization
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Memory organization
The memory is organized as pages (256 bytes each), with a specific mapping shown in
Figure
The M35B32 decodes addresses from 0000h up to 0FFFh. This makes an address range of
4 Kbytes organized as 16 pages of 256 bytes. The M35B32 can also be seen as two sectors
(the Data sector and the Event sector) which boundary is defined by the BPi status register
bits.
●
●
Both sectors can be erased in a single cycle, with the help of the Sector Erase instruction;
however, each page can be erased using the Page Erase instructions (recommended for the
Data sector).
Figure 5.
1. N is defined by the BPi bits (see
Each page can be individually:
●
●
●
When the Page Program instruction addresses bytes in the Data sector, the instruction is
executed with the programming time t
bytes in the Event sector, the instruction is executed with the fast programming time t
The Data sector (standard EEPROM) is at the top,
The Event sector (offering a fast programming time tFP) is at the bottom. The Event
sector can be also write-protected with pin W.
programmed (bits are programmed from 1 to 0),
erased (bits are erased from 0 to 1),
written (bits are changed to either 0 or 1).
5.
Memory organization
Section
Doc ID 18391 Rev 3
6.4.3).
PP
, when the Page Program instruction addresses
M35B32
FP
.